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[S390] css: Use css_device_id for bus matching. 

css_device_id exists, so use it for determining the right driver
(and add a match_flags which is always 1 for valid types).

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Cornelia Huck 2008-07-14 09:59:03 +02:00 committed by Heiko Carstens
parent 99611f8717
commit f08adc008d
4 changed files with 15 additions and 12 deletions
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15
drivers/s390/cio/css.c
View File

@ -850,19 +850,16 @@ int sch_is_pseudo_sch(struct subchannel *sch)
return sch == to_css(sch->dev.parent)->pseudo_subchannel;
}
/*
* find a driver for a subchannel. They identify by the subchannel
* type with the exception that the console subchannel driver has its own
* subchannel type although the device is an i/o subchannel
*/
static int
css_bus_match (struct device *dev, struct device_driver *drv)
static int css_bus_match(struct device *dev, struct device_driver *drv)
{
struct subchannel *sch = to_subchannel(dev);
struct css_driver *driver = to_cssdriver(drv);
struct css_device_id *id;
if (sch->st == driver->subchannel_type)
return 1;
for (id = driver->subchannel_type; id->match_flags; id++) {
if (sch->st == id->type)
return 1;
}
return 0;
}

2
drivers/s390/cio/css.h
View File

@ -75,7 +75,7 @@ struct chp_link;
*/
struct css_driver {
struct module *owner;
unsigned int subchannel_type;
struct css_device_id *subchannel_type;
struct device_driver drv;
void (*irq)(struct subchannel *);
int (*chp_event)(struct subchannel *, struct chp_link *, int);

8
drivers/s390/cio/device.c
View File

@ -131,9 +131,15 @@ static int io_subchannel_sch_event(struct subchannel *, int);
static int io_subchannel_chp_event(struct subchannel *, struct chp_link *,
int);
static struct css_device_id io_subchannel_ids[] = {
{ .match_flags = 0x1, .type = SUBCHANNEL_TYPE_IO, },
{ /* end of list */ },
};
MODULE_DEVICE_TABLE(css, io_subchannel_ids);
static struct css_driver io_subchannel_driver = {
.owner = THIS_MODULE,
.subchannel_type = SUBCHANNEL_TYPE_IO,
.subchannel_type = io_subchannel_ids,
.name = "io_subchannel",
.irq = io_subchannel_irq,
.sch_event = io_subchannel_sch_event,

2
include/linux/mod_devicetable.h
View File

@ -161,8 +161,8 @@ struct ap_device_id {
/* s390 css bus devices (subchannels) */
struct css_device_id {
__u8 match_flags;
__u8 type; /* subchannel type */
__u8 pad1;
__u16 pad2;
__u32 pad3;
kernel_ulong_t driver_data;